Clamp for concrete forms



p 1933. F. c. WOTNOSKE CLAMP FOR CONCRETE FORMS Filed May 20, 1952 Patented Sept. 5, 1933 CLAMP FOR CONCRETE FORMS Fred C. Wotnoske, Milwaukee, Wis., assignor to Metal Forms Corporation, Milwaukee, Wis, a corporation Application May 20, 1932. Serial No. 612,601

1 Claim. (Cl. 25-131) In concrete construction work, especially where portion 8, as will be more fully described herewalls are being built, it is customary to provide inafter. This handle portion is of suitable length forms for the walls including plates reinforced by to give a desired leverage, and a clamping porangular ribs extended longitudinally and transtion is formed integrally with the handle por- 5 versely of the plate. To increase the area of tion and is composed of a pair of diverging sides 60 these forms, it is of course usual to bring a pluforming clamping members for snugly receiving rality of plates into side by side relationship and therebetween a pair of mating ribs. The clampto clamp these plates together by suitable clamping portion 8 of the clamp is provided on one ing members carried by one of the end ribs of side with a projection 9 which is provided with a 10, one of the plates. relatively large hole 10 which allows the clamping 5;

The present invention relates to an improved device to be permanently mounted on its supform of clamping member which is provided with porting rib, which opening receives the shank means whereby it may be locked in clamping 11 of a lug or rivet having a relatively enlarged position against accidental displacement, the inhead 12, by means of which the clamp is secured vention being a simple form of clamping device in position on the upstanding side 5 of the 1011- 70 provided with very simple locking means. gitudinal end rib 2.

The invention will be more readily understood As previously described, this clamp is adapted by reference to the accompanying drawing taken to engage a mating rib 1 of the adjacent plate inin connection with the following description, in dicated in Figure 1 as B. In assembling the which drawing form, therefore, the plates A and B are brought Figure 1 represents a perspective view or" a pair together so that a rib 2 of the plate A and the of Wall form Plates clamped together by h mrib 1 of the plate B will flatly and flushly engage, p v form 0f p ng devices, which are the clamps 8 being then rotated around their re- ShOWII a being l ed against accidental disspective lugs, indicated generally at 13 in Figure 80 placement. 1, until the clamping members lea and 14 engage Figure 2 is a ar d p sp tiv vi w of as tightly as possible these mating ribs. To asone Of the Clamping members pp d i l i g sure accurate mating of the ribs, one of them position to a Pa Of ga g d bs 0f adjais conveniently provided with dowel pins 15 encent plates. tering corresponding holes through the other 85 Figure 3 is a side elevation of one of the end rib,

ribs which carries a clamping device of the pres- I rder to assure the clamps not becoming ent form. accidentally displaced, registering holes 16 and Figure 4 iS a perspective View O t e improved 17 are provided through the clamping members,

form of clamping device. and a similar hole 18 is provided through each 90 Fi ur 5 is a s t al v w t r u h engaging of the mating ribs, all of these holes being 1 end ri f dj n p h l pin brought into exact registry when the ribs are asvi in h wn in el v i h vi w being sembled and the clamping members brought into taken along the line f Figure 2. clamping position. The clamp is locked in this Referring more particularly to the drawing, it clamping position by the insertion of a pin or 95 will be seen that the plates A and 13 shown in ,111 19 through these holes.

Figure l as ing i side by i relation, are It will be seen from the drawing that at least reinforced by the longitudinal ribs 1 and 2 and one of the clamping members is provided with an the transverse ribs 3, there being a transverse ofiset extension or arm in which the hole 10 is along the p and bottom edgeS 0f the p located, by means of which the clamping device and suitably secured thereto. may be permanently mounted on its supporting These reinforcing ribs are conveniently in the i 5 the mounting being freely pivotal for alform of angles, one side of which rests flat lowing easy swinging of the clamping devic against the p as indicated t t e Other around the lug 13. The locking holes are placed side of the angle being upstanding as indicated in any suitable position, care being taken that 105 at 5. these holes exactly register with each other and TO O O e e s extending o itudina ly with the holes 18 extending through the mating along the edge of the plate, there are secured a ribs. The interlocking relation between the suitable number of clamping devices represented parts is obtained by passing the pin 19 through generally at 6, these clamping devices being proall of the holes, the pin fitting substantially no 5 vided with a handle portion 7 and a clamping tightly to prevent its slipping out, while being i sufiiciently loose to allow it to be easily Withdrawn, manually, from its holes. The pin 19 very rigidly secures the clamp in looking position as long as the parts are in assembled relation.

To release the clamp, the pin 19 is simply withdrawn and the clamp swung about the lug 13 until it is brought out of engagement with the ribs to release the plates.

In View of the fact that it is necessary for the sides of the ribs to lie flatly against each other, the lugs 13 are cut off smoothly of the outside surface of the angle side 5. For this reason lugs in the form of rivets instead of bolts are provided, and they are tightly held in position in the ribs by any desired manner, as by shrinking the ribs around these rivets, or by pressing them in place, or by any other manner of afiixing these rivets tightly in position. The end is cut off flush with the side of the rib, and smoothed down evenly therewith.

It will therefore be seen that this invention provides a very simple clamping device which is very simply adapted to be locked in position against accidental displacement by the simple provision of holes running through both sides of the clamp with the corresponding holes through the angles.

The pin or nail 19 passing through the two sides of the clamp and the two angles as well acts as a dowel in holding the two adjacent forms in perfect alignment with each other, so that the clamp having the nails through the clamp flanges and the angle flanges not only looks the clamp in place but brings the entire system of plates of the form in absolute alignment with each other.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is-

A clamping device for use on concrete molds and the like, which comprises a handle terminating in spaced clamping members for engaging cooperating flanges on the molds to interlock the flanges, at least one of which clamping members is provided with an extension projecting laterally of the handle and adapted to be permanently secured to the mold, the said clamping members and flanges being provided with openings extendins th r hr h n a ransver e di ction and adapted to be brought into registry to receive a l kin p n h h ou h, and a l ckin member removably inserted through the holes for securing the clamping device in locking position and fo ali n th fla es 01 th molds,

FRED o, WorNosKE. 

